I love that Urban Trials stuff, both the pushbikes and the motos, really inspiring stuff.
I saw that Julien Dupont video a few months back and ever since have put a greater focus into trying improve my balance when riding around on motorbikes. When some little shit nicked my Honda Bros commuter I replaced it with a stripped down CG125 which turned out to be a blessing in disguise as I've improved my balance and slow speed control a fair bit from riding it. Still can't balance perfectly stationary for more than a few of seconds before starting to topple or having to edge forwards though
I really wish I'd been into BMX or something as a kid, as I reckon it takes years and years to develop even half the skills some of those Youtube guys have.
I haven't ridden pushbikes much over the last 5 years, and it's been about 10 since I used to mess about on them and fall off etc. I dug out my old Mountainbike a few months back and fell off alot trying to balance and jump the kerbs on my street - The feeling of losing skin off the palms of my hands to the tarmac road took me straight back to my childhood!